luttropp



March 13, 1928. 1,662,526

c. LUTTROPP CALCULATING MACHINE Filed Aug. 13, 1923 10 Sheets-Sheet 1 Q I a 8 l5 2 a a m la i 2 E Q 5 \a a [a (a a J W Y a March 13, 1926. 1,662,526

' c. LUTTROPP CALCULATING MACHINE Filed Auz. 13, 1923 10 Sheds-Sheet 2 1,662,526 C. LUTTROPP CALCULATING mcaxma Filed Aug 13, 1923 10 Sheets$heet 5 March 13, 1928.

March 13, 1928.

1,662,526 c. LUTTROPP CALCULATING MACHINE Filed Aug. 15, 1923 10 Sheets-Sheet CALCULATING MACHINE Filed Auz. 13, 1923 10 Sheets-Sheet 6 March 13, 1928.

C. LUTTROPP CALCULATING MACHINE Filed A112. 15, '1923 10 Sheets-Sheet 7* 3. L w QM N N mlfi \N as Q mwlfi 1 T L N 3 ww H.

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March 13, 1928. 1,662,526

0. LUTTROPP CALCULATING MACHINE Filed Aug. 13, 1923 10 Sheets-Sheet 8 March 13, 1928.

C. LUTTROPP CALCULATING MACHINE 1O Sheets-Sheet 9 Filed Auz. 13, 1923 March 13, 1928.

C. LUTTROPP CALCULATING MACHINE Filed Aug. 13, 1923 10 Sheets-Sheet 10 Patented Mar. 13,1928.

UNITED STATES CONRAD LU' ITROP.P, OF STOCKHOLM, SWEDEN, ASSIGNOR or ONE-EAL! 10 m m LINDAHL, OI STOCKHOLM, SWEDEN.

CALCULATING MACHINE.

Application filed August 18, 1923, Serial No. 657,148, and in Sweden August 14, 1D.

This invention relates to an improved tcn-key-operated calculating machine.

The chief object of the invention is to provide a machine of the type specified which is adapted to perform addition and subtraction as well as multiplication and division and which combines the features and utility of the adding and multiplying machines while being simple and reliable in its construction.

The chief feature of the invention consists in the provision of a rotatable selector having groups of vertically disposed adjustable stops corresponding to the digit keys which stops are set in working position by the depression the corresponding keys while the selector is simultaneously rotated step by step, whereupon said stops on actuating the handle ofthe machine control the setting of corresponding counting spindles in relation to a rotatble counting drum, which is provided with series of teeth the number of which in order corresponds to the several digits and which in rotating transmit through the said counting spindles and other transmitting means the number set up by the depressed keys to the main counting register.

The invention comprises further means for indicating the number set up, means for returning the selector and the counting spindles to their normal positions for each operation of the operating handle if the machine is used for addition, or for maintaining the selector and the counting spindles in their set position while the operating handle is repeatedly operated, when the machine is used for repeated addition or subtraction of the same number or for multiplication or division, means for reversing the direction of rotation of the counting drum when the machine is used for subtraction or division and further several other means for securing a safe operation and a simple use of the machine as will be more fully described in the following description.

In the accompanying drawings I have shown one embodiment of my invention. Fig. 1 shows a top view of the machine. Fig. 2 shows a similar partly sectional view. Fig. 3 shows a cross-sectional View of the machine, some parts being omitted for the sake of clearness. Fig. 4 shows a top View of the selector. Fig. 5 shows a cross-sect-ional View of a part of the selector and the 111g register 9 and a arms for operating the tongues or stops of the selector. Fig. 6 shows a perspective view of the lever mechanism of the selector and a corresponding key. Fig. 7 shows a partly sectional sideview of a part of the drlving mechanism of the machine and of the mechanism for resetting the counting spindles. Figs. 8 and 9 are detail views of the driving mechanism. Fig. 10 shows a partly sectional plan view of the essential parts of the driving mechanism. Fig. 11 shows a detail view of the mechanism for reversing the direction of rotation of the counting drum. Fig. 12 shows a partly sec tional side view of the selector and'the'countmg drum and the counting spindles set in working position. Fig. 13 a side view of the mechanism for returning the counting drum in normal position. Fig. 14 is a front view of the tabulator of the carriage. shows a detail view of the ratchet wheels of the tabul'ator. Fig. 16 is a top view of the t-abulator. Fig. 17 is a side view of the tabulator and one of its two operating keys. Fig. 18 1s a detail View of some parts of the tabulator. Fig. 19 is a front view of other parts of the gear between the tabulator andits two keys. Fig. 20 shows a detail sectional view of the releasing handle of the carriage taken on the line aa in Fig. 19. Fig. 21 is a plan of the tens transferring mechanism and its driving mechanism. Fig. 22 is a side view of the driving sector and its catch mechanism. Fig. 23 shows a section of the driving sector on the line 7)b in Fig. 22.

Fig. 24: is a side view of the means shown in Fig. 21. Figs. 25 and 26 show side views of the tens transferring means in different positions. Fig. 27 shows a side view and F1g. 28 a top view of a signalling device for lndicating if the capacity of the machine is overpassed.

Referring now to the drawings, the chief parts of the machine consist of a key board 1, a to and fro movable operating handle 2, a selector 3 movable step by step forwards or backwards, a counting drum 4 rotatable in either direction, counting spindles 5 'cooper ating with the selector and the counting drum, a register 6 for indicating the number Fig. 15'

set up, a carriage 7 containing amain counthandle register or quotient register multiplying machines.

The key board 1 (Figs. 1 and 2) contains stroke counting 8 as is usual in keys 10 to 19 corresponding to the digits 0 to 9 respectively, two tabulator keys 20 and 21 for stepwise moving the carriage to the right or to the left, two keys 22 and 23 for setting the. machine for addition andmultiplication or for subtraction and division respectively, a. key 24 which 15 held in depressed position in repeating the same num ber setup, as for instance in multiplication or division. and thereby prevent-s the re- The operating handle 2- is journalled in the right end wall 29 and movable forwards movement in other positions one end of about On its shaft a toothed sector 30 (Figs. 10 and 22) is secured which engages apinion 31. The pinion 31 is rotatably mounted on the horizontal driving shaft 32 and connected to said shaft by means of a pawl 33 secured to the pinion 31 and a toothed wheel 34 secured to the shaft 32 (Fig. 24) so that the shaft 32 is rotated when the handle 2 is drawn forwards, while the shaft 32 remains inoperative when the handle is returned to its normal position. The handle 2 is preferably provided with a locking mechanism whic prevents the reversal of its direction of than its end positions. The said locking mechanism consists of a friction catch 35 (Fig. 23) journalled on a pin 36 on the inner side of the wall 29, said catch engaging a cam surface 37 on the toothed sector 30 and the other end being actuated upon by a spring 38, which holds the catch 35 in a middle position when the toothed sector is in either ofits end positions in which the catch is out o engagement with the cam surface 37 of the sector. When the toothed sector: 30 is turned for instance clockwise in Fig. 22, the catch 35 is turned counter-clockwise so that it obtains a slightlyoblique position, as long as its topend engages the cam surface 3 If the operator now seeks to reverse the direction of movement of the handle 2, the

and backwards top end of the catch is taken with by the friction against the cam surface 37 the catch is jammed between the cam surface 37 and the pin 36 and thus prevents the rotation of the toothed sector. For returning the handle 2 and the toothed sector 30 to the normal position a clock spring (not shown) is provided in a housing 40 formed by the hub of the handle 2. V

For stopping the movement of the shaft 32 f the shaft.

so that when it has been rotated a full revolution and preventing its being turned further by the momentum of the movable parts connected therewith a locking lever 41 (Fig.- 7) is provided, said lever being journalled on a pin 411 and acted upon by a pressure spring 412. The free end of said-lever carries a latch 413- which cooperates with a cam disc 414 secured to the shaft 32. The lever 41 has further a projection gaged by a cam 416 secured to the shaft 42 which latter is rotated from the shaft 32 415 which is enwhen the handle 2 is'returned to its normal position as will be further described in the following description. In the normal position the locking lever 41. is pressed "down against the action of the spring 412 and its button 413 engages with its side surface the highest portion of the cam 414. When the handle 2 is turned forwards rotated in the direction of the arrow shown in Fig. 7 and the locking lever 41 rides on the cam 414 being pressed upwards by the spring 412. When the shaft 32 has performed a full revolution the cam 414 strikes the end surface of the button 413 so that a further movement of the shaft 32 is stopped and the button 413 is slightly pressed in. Then the handle 2 then is returned to its normal position the shaft 42 is rotated one revolution as will be later described and during this operation j iction 415 so that the locking lever 41 is pressed. down until the button 413 can be pressed out by its spring and again take a possition in which its side surface engages the highest portion ofthe cam 414.

On the inner end of the shaft 32 a bevel gear wheel 45 (Figs. 3 and 10) is secured which permanently engages two other bevel gear wheels 46, 47 which are loosely mounted on a vertical shaft 48. Between the wheels 46, 47 a clutch-coupling 49 (Figs. -10 and 11) is provided which by means of slotand key is connected to the shaft 48 in such manner that it can move axially but not rotate on The end surfaces of the bevel wheels 46, 47 are provided with jaws corresponding to the jaws of the clutch 49 so that e ther'of said wheels 46, 47 can be coupled to the shaft 48 and the latter accordingly be rotated in either direction from the shaft 32 which always is rotated by the handle 2 in he same direction.

The clutch 49 is operated by the keys 22 and 23. Said keys are by'means of be crank levers 441, 442 and connecting links 50, 51 (Fig. 11) respectively connected to other bell crank levers which by means of links 54 and 55 respectively are connected to both ends of a lever 56, which is secured to a sha journalled in the frame plate 27. The inner end of said shaft 57 supports a fork 58 (Fig. 10) engaging the clutch 49. The keys the cam 416 engages the pro- 52 and 53 respectively 22 and 23 are thus interconnected by said levers and links insuch manner that'when one key, for instance 22, is depressed the other key 23 is returned to its upper posi tion, and vice versa.

The selector 3 (Figs. 4 and 12) is loose ly jonrnalled on the shaft 48 while the counting drum 4 is rigidly secured to Said shaft. The selector is constructed as a drum and the counting spindles 5 are equidistantly disposed around the said drum. Each spindle 5 has on its middle portion a pinion 59 adapted to be acted upon by the counting drum 4. At-the lower end each spindle has a head 60 which is embraced by a fork 62 secured to the lower end of a uiding rod 64 movably journalled in Y the frame plates 26, 27 and 28 and acted upon by a spring 63. Normally all counting spindles are held in their lower )ositions by a half-circular flange ring 65 (higs. 3 and 10) supported by vertical guides 66 which passes through corresponding guidin openings in the frame plates 26 and 27 an at the top are connected with levers 67 rigidly 'secured to a shaft 68. The means for operating the flange ring 65 consists of a link 69 connected to one (the right) lever 67. The said link has near to its lower end a notch 70 (Fig. 7) engaged b the hooked end of a catch lever 71 journalht 72 secured in the end of a lever 73. The catch lever 71 is by means of a link 74 con nected with a bell crank lever 75 which is engaged by the key 24 so that the coupling between the link 69 and the lever 73, when desired, can be released by depressing the key 24. hen the catch lever 71 is released the lever 73 can move freely in relationto the'link 69 but the said parts 7 3 and 69 are also in said case maintained in a certain bound position in relation to each other by that a pin 76 on the lever 7 3 remains in engagement with an oblong opening 77 at the lower end of the link 69. Secured to the lever 73 is a link 39 the upper end of which is furcated and embraces the driving shaft 32. Closely to the fork of the link 39 a cam disc 391 is secured to the shaft 32 the cam 392 of said disc engaging a pin 393 on the link 39 so that the lever held depressed.

The selector 3 is provided with a plurality of verticalgronps of radially movable tongues or stops 79 which are held in the idle or the operative position by means of friction springs 80. The number of tongue groups corresponds to the number of counting spindles 5. Each tongue group consists of nine tongues disposed equidistantly in a vertical row, said tongues being adapted in their operative position to form stops for limiting the vertical setting of the counting spindles, when the flange ring 65 is released. The frame of the selector has at the top a d on the pin 73 normally is ring 81 provided with a projecting flange 82 which replaces a tenth row of tongues. At the bottom the frame of the selector has also a projecting flange 83 extending along apart of the. periphery corresponding to the distance from the tirst.to the last counting spindle, said flange forming a locking device for the counting spindles in their lowermost position. Secured on the ring 81 of the selector frame is a ring'84which on its inner side is provided with teeth 841 the itch of which corresponds to the pitcho the selector tongues in perifcral direction. Said teeth 841 are engaged by two pawls'85 and 86 journalled on a pin 87. The pawl 85 is acted upon by a spring 88 which tends to hold it in engagement with the toothed ring 84 while the pawl 86 is acted upon by'a spring 89 tending to draw it out of engagement with said ring. The pawl 85 is provided with a downwardly extending pin 90 and the pawl 86 is provided with a downwardly extending pin 91, said pins and 91 engaging ten levers 92 which are journalled on a rigid pin 93 and each connected to one of the keys 19 to 19 by means of a link 94 and a bell crank lever 95. The lowermost lever 92 corresponds to the digit 0, the next following lever to the digit 9, the next following to the digit 8 and so on. All levers 92 with the exception of the uppermost one have at one end a cam-shaped part 96 by means of which the lever can operate and push out an opposed tongue 79 in the selector, the lower-most lever 92 cooperating with the lower-most row of tongues, the following lever with the next row of tongues, and so on.

-For effecting the rotation of the selector its top ring 84 is provided with teeth 97 (Fig. 4) which are engaged by a pinion 99 rotatably jonrnalled on a rigid pin 98, said pinion being rigidlv connected. with another pinion 100 journalled on the same pin. A spring 102 (Fig. 13), is provided on the pin 98, one end of said spring being connected with the pin and the other end with the pinion 100, and it tends to rotate the pinion 100 in the direction indicated by the arrow in Fig. 4. The selector can accordingly be rotated counter clockwise by said spring and gear when the pawls 85 and 87 alternately are brought out of engagement with the toothed ring 84 whereby the tongue groups of the selector are moved step by step for engagement with the spindles 5 so that after 10 steps one group of tongues is in position for cooperation with each spindle.

The resetting of the selector in the normal position is effected by means of a rack 101 engaging the pinion 100 and actuated upon from the handle 2. For that purpose the toothed sector 30 is by means of a pin 103 (Fig. 7) connected with one end of a link 104 the other end of which is provided with a pin 105, engaging a longitudinal slot- 106 in a slotted link 107. A pawl 108 is ournalled on the pin 105. said pawl having a pin 109 guided by the slot 106 and a tooth 110 which when the rack 101 has been moved towards the key board (to the right in Fig. 8) is adapted to catch the front end of the rack and move the rack back to the normal )osition each time the handle 2 and the toothed sector -are returned to their nor- .the pawl comes below the path of the rack 101. The slotted link is for said purpose supported by two bell crank levers 111 and 112 which are connected with each other by a link 113 and b another link 1141 and the bell crank lever 5 with the key 24. When .the handle 2 is in its normal position the pawl 108 must also be out of the path of the rack 101' so that it does not prevent the setting of theselector. The slot 1060f the link 107 is for that purpose provided with a downwardly inclined extension 115 which when the handle 2 is in the normal position, holds the pawl turned downwards, (Fig. 7) so that its tooth 110 in this position is below the rack 101 even if the slotted link 107 has not been lowered.

The counting drum 4 is composed of ten circular discs rigidly connected to each other. The lowermost disc corresponding to the digit 0 has no teeth, the next following disc has such number of teeth that it when engaging-the pinion of one of the counting spindles can move the spindle an angle corresponding to nine numeral distances in the counting wheels operated from the spindles, and so on, so that the uppermost disc of the drum has such number of teeth that it can rotate a counting wheel operated from it an angle corresponding to one numeral distance only when the counting drum is rotated one revolution. The thickness of the discs of the counting drum corresponds to the distance between the tongues 79 of the selector in vertical direction so that when a counting spindle is released and raised until it is stopped by a selector tongue 79 pressed out in operative position, its pinion 59 will be set in front of the corresponding disc of the counting drum.

For resetting the tongues ofthe selector in their normal idle positions when the selector is returned to its normal position an angular resetting piece 116 is provided closely to the normal position of the first tongue group, which piece presses in the v p f 1,002,626 7 tongues previously set in operative position when said tongues pass the resetting piece. For enabling a safe resetting also of the last tongue counted in the direction of rotation when the selector is returned to normal position the device is such that the'selector is rotated somewhat over its normal position before the pawl 108 is released from the rack 101, whereupon the spring 102 again moves the selector forwards until it is locked exactly in the normal position by the pawl 86 (Fig. 4'.)

Before the selector is returned to the normal position the counting spindles must be returned to theirnormal positions inwhich they are locked by the flange 83 (Fig' 4) of the selector. This resetting of the spindles is effected by means of the flange ring by that a pin 241 on the toothed sector 30 (Fig. 7) atthe end of the forward movement of the handle engages the lever 73 so that the latter is pressed down and by means of the catch lever 71, the link 69 and the arm 67 carries with the flange ring 65 so that the latter presses down all spindles in their normal positions. The several parts are locked in this position by the cam disc 391 which now has been rotated one revolution so that its cam 392 again locks the pin 393 on the link 39 with its highest portion.

The transmitting of the movement from the counting spindles to the main counting register 9 of the carriage 7 ,is effected by the following means. Above each counting spindle 5 another spindle 117 (Fig. 12) is provided said spmdle being rotatably mount-ed in the frame plate 28 and the lower portion of which is furcated and embraces the upper flat portion of the counting spindle so that the latter can move axially in relation to the spindle 117 but not rotate in relation thereto. At the upper end of each spindle 117 a bevel gear wheel 120 is secured, which engages a bevel gear wheel 121 on one end of a transmittine shaft 122 journalled on the frame plate 28, the other end of said shaft having a bevel gear wheel 123 engaging a similar wheel 124 rigidly secured to a star wheel 125 (Fig. 3). The star wheels cooperate with corresponding toothed portions 118 of the counting wheels 126 in the main counting register in such manner that a rotation of the star wheel an angle corresponding to the distance between two teeth effects a rotation of the corresponding counting wheel an angle corresponding to the distance between two consecutive numerals. After each rotation the star wheels are stopped in such position in relation to the corresponding counting wheels that they do not hinder the movement of the carriage sideways or the rotation of the counting wheels which take place in the tens transfer independently of the star wheels. The num-- ber' obtained in the main counting register Hit) 'ated by one of the teeth is observed through openings 127 the front cover of the carriage.

The counting wheels. are prevented from rotating past the exact positions by a spr ngactuated pawl 179 provided in the carriage at each counting wheel and engaging tie toothed portion 118 of said wheel. When a tooth of the star wheel leaves its engagement with the toothed portion of the counting wheel with the toothed portion by means of a catch 180 mounted in the machine frame, inasmuch as the latter simultaneously is operof the star wheel. The set up register 6 the purpose of which is to indicate the number set up on depressing the digit keys 10 to 19 is operated from the guiding rods 64 of the counting spindles, said rods being extended upwards and each engaging with its upper end one arm of a corresponding bell crank lever 128 (Fig. The other arm of said lever 128 is connected with a rack 129 engaging a pinion 130 which is rigidly secured to a toothed sector 131. Said sector engages a toothed portion of the (Fig. 1 in corresponding numeral wheels in the set up register. Each displacement in vertical direction of a spindle 7 causes thus acorresponding setting of the corresponding numeral wheel in the set up register and the returning of the spindle to its normal position causes the zeroising of the corresponding numeral wheel in said register.

For correcting a numeral which has been erroneously set up on the key board without resetting the selector to normal position, means are provided for a stepwise returning of the selector towards the normal position.

Said means consists of the correcting key 25 (Fig. 7) which by means of a bell crank lever 133 and a link 134 is connected to one I arm of a lever 135 the other arm of which end of the pawl 136 carries a pawl 136 the front portion of which is furcated and guided by a pin 43 secured to an angular plate 431 which is secured to the right side plate 29. The rear engages when the key 25 p is depressed teeth 137 on the under side of the rack 101, so that said rack is moved backwards so far that t rotates the selector one step backwards whereby the tongue 79 which has erroneously been set in workin posit-ion is returned to normal position by the angular piece 116.

The handle stroke counting register or quotient register 8 of the carriage is operated by the following means. To the upper end of the shaft 48 a bevel gear wheel 138 (Figs. 2 and 3) is secured said wheel engaging a similar wheel 139 secured to one end of a shaft 140 journalled on the frame plate 28. The other end of said shaft has a bevel gear wheel 141 engaging a similar wheel 142 secured to one end of a shaft 143 the other end of which carries a bevel gear wheel 144 said pawl is locked in engagement engaging a similar wheel 145 on a shaft 140, thelatter carrying also another wheel 147 having one tooth only. The ratio of gear from the shaft 48 to the wheel 147 is such that said wheel is rotated one revolution each time the handle 2 isoperated. The wheel 147 cooperates in usual manner with the numeral wheels inthe handle stroke register of the carriage, the numeral wheel in said register which at the moment registers with the wheel 147 being rotated one numeral distance in .the one or other direction every time the handle 2 is operated.

The tens transferring means in the main counting register of the carriage areconstructed in the following manner.

As before stated, the counting .drum 4 rotates in either direction, one direction for addition and multiplication, and the other for subtraction and division. The transmitting shafts 122 are similarly rotated from the drum 4, so that the counting wheels 126 are moved positively or negatively, in accordance with the direction of movement of the drum. This positive and negative rotation of the number wheels automatically sets the transfer mechanism for positive or negative transfer when passing through zero.

Each numeral wheel 126 has a. pin 148 adapted to rotate a lever 149 from a middle position (Fig. 24) in either direction (Figs. 25 and 26) when the numeral 9 is exceeded in adding or the numeral 0 is exceeded in subtracting. Said levers 149 are journalle-d on pins 150 secured to the right side of cross plates 151 (Fig. 21), which separate the numeral Wheels 126. Each lever 149 is provided with a catch 153 acted upon by a spring 152 and journalled on a longitudinal shaft 154 in the carriage. Said catch has three notches 155, 156 and 157 the middle one 155 of which locks the lever 149 in normal position (Fig. 24), preparatory to being shifted positively or negatively by the number wheel pin 148, the outer notch 156 holding lever 149 in position for tens transfer in adding (Fig. 26), and the inner notch 1557 holding lever 149 in position for tens transfer in subtracting (Fig. 25) respectively. On the opposite side of the cross plate 151 in relation to the corresponding lever 149 a swingable carrier 158 isprovided, said carrier being journalled on the shaft 154 and carrying at its front end a pinion 160 journalled on a pin 159. Said pinion 160 is always in engagement with the toothed portion 118 of the numeral wheel 126 which lies on the left side of the cross plate 151 in question, independently of the position of the carrier 158. he carrier 158 is provided with a pin 161 which freely passes through an opening in the cross plate 151 and engages an opening in the lever 149 so that the carrier is turned upwards when the lever 149 is actuated upon b the pin 148 of the numeral wheel 126 place to the r ght and carrier 158 has been adjusted for tens transferring by the action of the pin 148 of the numeral wheel 126 placed to the right of the cross-plate 151, two longitudma shafts 162 and 163 are provided inthe carria c, said shafts having one projection 164- an 165 respectively for cooperation with each pinion 160. In the middle or normal position of the carrier 158, i. e., when lever 149 is in the middle notch 155 oflever 153, the pinion is out of the path of the corresponding projections of the shafts 162, 163 but when adjustment for tens transferring in adding, has taken place as is shown in Fig. 26, the pinion 160 is in corresponding projection shaft 162 so that when it is acted upon by the projection 164 so far that the corresponding numeral wheel is advanced one numeral distance. If, on the contrary, adjustment for tens transferring in subtracting has taken place, as is shown in Fig. 25, the pinion 160 is'in the path of the corresponding projection 165 of the shaft 163 so that at the rotation of the latter which takes place in opposite direction to the rotation of the shaft 162, the pinion 160 is actuated upon by the projection 165 so far that the numeral wheel 126 is rotated backwards one numeral distance. For effecting a successive tens transfer from the right to the left the projections 164 and 165 are provided on a screw line on the shafts 162 and 163 respectively.

The shafts 162 and 163 are connected to each other by toothed wheels 166, 167 so that they are brought to rotate in opposite directions and obtain their movement by a. gear from the handle 2, when the latter is returned to normal position. As already mentioned the toothed sector 30 connected with the handle 2 engages a pinion 31 which is loosely mounted on the shaft 32 and is by a pawl 33 and-a toothed wheel 34 connected with the shaft 32, so that said shaft is rotated when the handle 2 and the sector 30 aredrawn forwards while the pinion 31 rotates freely on-the shaft 32 when the handle 2 is returned to normal position. The pinion 31 engages another pinion 168, which is loosely mounted on the shaft 42 and by means of a pawl 169 and a toothed wheel 17 0' connected with the shaft 42. The pawls 33 and 169 are so mounted that rotation of the I pinion 31 by a forward movement of the handle causes the shaft 32 tobe driven through the pawl 33 while the pinion 168 idles on its shaft 42. During the return movement of thehandle the pinion 31 idles on its shaft 32 while the pinion 168 drives its shaft 42 through the pawl 169. Secured on theshaft 42 is another pinion 171 which by means of transmittin wheels 172, 173 are connected with a toot ed drum 174, the length of which corresponds to the motion of the carriage and which is engaged by a pinion.17 5 on the carriage, said pinion engaging also a pinion 176 secured to the shaft In the constructional form shown the ratio of gear from the handle 2 to the shafts 162, 163 is chosen so that said shafts are rotated two revolutions during the returning of the handle 2 to normal position. By increasing the ratio of gear the said shafts can'be rotated more than two revolutions and thus effect the tens transferring operation at any desired number of counting wheels while a sufficient angular difference between the successive pro'ections of the shafts 162, 163 is maintains for enabling a successive tens transfer.

The returning of the carrier 158 and the lever 149 to the normal position is effected immediately after the performance of the tens transferring operation by that the projection 164 or 165 of the shaft 162 or 163 hits a projection 177 or 178 of the carrier 158 and turns the latter to the middle position, the lever 149 being simultaneously carried by the pin 161.

The tabulator for moving the carriage 7 is constructed as follows. The carriage 7 is at the top provided with rollers 193 which run on a guiding rod 194 in the machine frame and in the lower part with a guiding rod 195 which is guided by rollers 192 journalled in the machine frame (Figs. 2 and 3). Secured to the machine frame is a catch bar 196 in which with equal distances, corresponding to the distances between the counting wheels in the carriage, notches 197 are provided and engaged by a spring-actuated catch .198 journalled on the carriage. Said catch has a handle 199 for its releasing by hand, if, desired. At the bottom of the carriage, a. rack 200 is secured. Said rack is engaged by a pinion 202 loosely mounted on a pin 201 secured in the frame of the machine and rigidly connected with two toothed wheels 203 and 204 journalled on the same pin (Figs. 14, 15 and 16), said wheels having teeth directed to oppositedirections. In the plans of said toothed wheels 203 and 204 and at opposite sides thereof spring-actuated pawls 205, and 206 respectively are provided, said ratchets being-journalled on levers 207 and 208 respectively which are 'journalled on the pin 201. Between the lower ends the levers 207 and 6 spring 7 machine frame.

I spectively.

tending to hold projections 209 and 210 on the arms of said levers 207 and 208 respectively in engagement with corresponding guiding ins 212 and 213 respectlvely secured in t e front plate 214 of the The levers 207 and 208 carry further screw pins 215 and 216 respectively the projecting ends of wh ch are guided byslots 190 and 191 respectively in vertically movable slides 217 and 218 re- The other arms of the levers 207 and 208 are angular and form stops oblique 219 and 220 respectively for the pawls 205 and 206- respectively. The slides 217 and 218 meat the lower portion provided with portions 221 and 222 respectively. Said portions are engaged by pins 223 and 224 respectively each supported by one arm of bell crank levers 225 and 226 respectively, which levers are rigidly secured to a shaft 227 journalled on'the frame plate 214. The other arms of said bell crank levers are by means of links 228 and 229 respectively connected with a releasing yoke 230 (Figs. 19 and 20) journalled in the frame plate 214 below the catch 198. The slides 217 and 218 are by means of pins 231 and 232 respectively connected with bell crank levers 233 and 234 respectively, said levers being by means of links 235 and 236 respectively connected with other bell crank levers 237 and 238 respectively which are connected with the keys 20 and 21 respectively. The slides 217 and 218 are at the top provided with pins 239 and 240 respectively engaging the rear sides of the pawls 205 and 206 respectively.

The operation of the tabulator for moving If for instance to the right the key 20 is depressed causing the slide 217 to be drawn downwards and the oblique portion 221 to operate'the pin 223 so that the bell crank lever 225 is turned and by means of the link 228 raises the yoke 230 which latter lifts the catch 198 out of engagement Furthermore, the pin 239 presses the ratchet 205 into engagement with the correspondin ratchet wheel 203 which is rotated toget er with the pinion 202 so that the carriage is moved to the right as soon as the slide 217 during the continued downward movement by means of the screw pin 215 rotates the lever 207. \Vhen the lever 207 is rotated its projection 219 also Operates the other pawl 206 so that the its corresponding ratchet .wheel 204 and limits the movement exactly to one step corresponding to the distance between the successive counting wheels in the carriage. When the key 20 then is released the slide 217 returns to its normal position and the pawls 205 and 206 are'brought out of engagement with the ratchet wheels 203 bar 196 whereby the carth and 204 respectively. At the same time the catch 198 en ages a notch 187 of the locking bar 196 so t at the carriage will be locked in the new position. For moving the carriage to the left the key-21 is depressed thus causing the slide 218 and its cooperating parts to be operated in a similar manner as above described.

As the pawls 205 and 206 in their normal positions are out of engagement with the ratchet Wheels 203 and 204 respectively the carriage can be released by depressin r the handle 199 of the catch 198 by hand w lereupon the carriage can be moved to the right or to the left any desired number of steps.

For signalling when in a calculating operation the capacity of the machine is exceeded, which for instance in subtracting takes place When the remainder in the main counting register is less than the subtrahend, the following means are provided (Figs. 2, 27 and 28).

With the counting left in the main counting register of the machine a device for operating a bell 241 when said counting wheel in adding is turned from 9 to 0 or in subtracting from 0 to 9 is combined. Said device consists of a pin 242 secured to the counting wheel 126, said pin being adapted to operate at the said moment one end of a lever 244 journalled on a pin 243. The other end of said lever engages a notch in one end of a lever 246 journalled on the shaft 154. The form of said .notch is such that the lever 246 is turned in the same direction independently of the direction in which the lever 244 is turned by the pin 242. The lever 246 is actuated upon b a spring 247 which tends to return it an the lever 244 into their middle positions shown in Fig. 27 as soon as the pin 242 has passed the en of the lever 244. The opposite end of the lever 246 engages a crank shaft 248 which supports the hammer 250 of the bell 241, said hammer being actuated upon by a spring 249. When the pin 242 in exceeding e capacity of the machine operates the lever 244, the lever 246 is rotated to the position shown by dotted lines in Fig. 27 and operates the crank shaft 248 so that the hammer 250 is raised. As soon as the pin 242 has passed the endof the lever 244, the lever 246 returns to the normal position under the action of the spring 247 and at the same time the hammer 250 is pulled down by the spring 249 so that it strikes the bell and indicates the exceeding of the capacity of the machine.

The use of the machine in performing counting operations is as follows. it being supposed that the machine by depression of the key 22 has been set for addition and that the number 236 is to be added to a sum already registered in the main counting register. The selector, the counting drum and the counting spindles are at the beginning of the tated one revolution by the sector 30, the

operation in their normal positions. First pinion 31, the pawl 33, toothed wheel 34 the number 236 shall be transferred to the and the shaft 32, the bevel gear wheels 45 selector 3, this operation taking place by deand 46, the clutch 49 and the shaft 48. I

5 ressing the keys 12, 13, and 16 correspond- During this rotation of the counting drum 7 mg to the digits 2, 3 and 6 respectively, in the set spindles are operated in such the order mentioned (Fig. 1). manner that the set up, digits are trans- In depressing the key 12 the ninth of the mitted to the counting wheels. of main levers 92 counted from below, is operated so counting register by the spindle 117, wheels that said lever with its head 96 presses out 120, 121, shaft 122, wheels 123, 124 1a the ninth tongue counted from below in the and star wheel 125. The rotation of the first vertical group of tongues in the seshaft 48 is also transmitted by the wheels lector. At the same time said lever 92 op- 138, 139, shaft 140, wheels 141, 142, shaft crates the pawls 85 and 86 so that the se- 143 and wheels 144, 145, to the wheel 147,

lb lector is released and can move one step which operates the facing numeral wheel in so counter-clockwise Fig. 4, by the action of the the handle stroke counting register so that spring 102. When the key 13 is depressed said wheel is rotated one numeral distance. the eighth lever 92 counted from below is When the handle 2 approaches its .front end operated whereby the eighth tongue 79 position the calculating operation is finished counted from below, in the second vertical and the set parts are to be returned to their 85*. group of the selector is pressed out into opnormal positions. For that purpose the pin erative position and at the same time the 241 first operates the lever 73 so that the pawls 85 and 86 are actuated upon in such latter is pressed down and carries with the manner that the selector is released and flange ring 65 which now presses down the can move a further step counter-clockwise. three counting spindles previousl set to am When the key 16 is depressed the fifth lever their normal positions whereupontlie flange 92 counted from below is operated and ring is locked in the depressed position by presses out the fifth tongue counted from the cam 392 again engages the pin 393.

below, in the third vertical group of the se \Vhen the handle 2 is-drawn forwards the 30 lector into operative position and at the link 104 also operates the pawl 108 so that 95 same time the pawls 85 and 86 are operated the latter with its tooth 110 catches the front in such manner that the selector can move a end of the rack 101. When the set spindles further step counter-clockwise. The first are returned in the normal position also the gfi'oup of tongues is now right before the numeral wheels of the set up register 6 are t ird counting spindle 5, the second group zeroised.

of tongues right before the second counting \Vhen the handle 2 and the sector 30 spindle and the third group of. tongues rightthen are returned to their normal positions before I the first counting spindle. Said the shaft 32 remains inoperated inasmuch counting spindles have become released from as the pawl 33 slides on the'toothed wheel 40. the flange 83 but are still locked in their 34. The pawl 108 of the link 104 now car- 105 lowermost position by the flange ring 65. ries with the rack 101 so that the latter by -Now the handle 2 is drawn forwards. In means of the pinions 100 and 99 returns the such operation the flange ring 65 is immeselector to the normal position, the prediately released by the cam 392 of the cam viously operated tongues 79 being at the 45' disc 391 being disengaged from the pin 393 same time pressed back to their normal powhen the shaft 32 is rotated and the three sitions by the angular piece 116. At the above-mentioned counting spindles which same time the flange 83 passes over the heads are not locked by the flange 83, are drawn 60 of the returned spindles so that the latupwards by their springs 63 until their ter are locked in their normal positions in- 50 heads 60 are stopped by the operative tongues dependently of the flange ring 65. During in the three first tongue groups of the the return stroke of the handle 2 the shaft 42 selector. The said spindles are thus setin is rotated by means of the toothed sector such positions that their pinions 59 come in 30, the pinions 31 and 168, the pawl 169 and alignment with the ninth, eighth, and fifth the toothed wheel 170 and said movement is 55 discs respectively of the counting drum, by means of the wheels 171, 172, 173, the counted from below. The other counting toothed drum 174'andthe wheel 175 transspindles remain in their normal positions mitted to the shafts163 and 162. The latlocked by the flange 83. \Vhen the said ter operates now successivelyfrom the right three counting spindles move upwards the to the left the tens transferring means of 00 number set up is transmitted through the the counting wheels, at which adjustment part-s 64 and 128 to 131 to the corresponding for tens transfer has taken place when the numeral wheels 132 in the set up register 6 number set up was transmitted to the main so that the latter indicates the number 236. counting register as above described. The When the handle is turned further in the machine is now ready for proceeding with 65 forward direction the counting drum is to the adding operation by setting a new numthe bevel gear wheel neeaeae be:- by depressing the-corresponding digit keys and'its transferring to the main counting register by the operation of the handle 2 as above described. As is understood from the above description, the use of the machine'in addin is exactly the same as that of a usual ten-kev-operated adding machine.

he resent machine difi'ers, however, from usua addin machines by that it can be used for performing subtraction in the same simple manner as addition. When subtraction takes place the key 23 is depressed, whereupon the calculating operation takes place in the same manner as in performing addition. When the key 23 is depressed the clutch 49 is axially movedso that the wheel 47 is made operative instead of the wheel 46 and the direction of rotation of the shaft 48 is accordingly reversed. The number set up is now trans before to the selector and the counting spindles butfrom the later with reversed direction of rotation to the main counting register when the handle 2 is operated, inasmuch as the direction of rotation of the counting drum is reversed-so that it rotates the counting spindles in opposite direction to the rotation in addin The tens transferring operation is pe ormed by the shaft 163. Also in the handle stroke counting register the direction of rotation is reversed by that I 138 rotates in opposite direction to the rotation in adding so that the toothed wheel 147 engaging the registering numeral wheel is rotated back a numeral gistance every time the handle 2 is operate While in adding or subtracting a new number is set up for each operation and the selector accordingly must every time be returned to the normal position the number set up and the corresponding setting of the selector and the counting spindles is used repeatedly in performing multiplication and division, viz. until the calculatlng operation is performed. It may be supposed that the number 324 shall be multiplied by 34. For performing this operation the number 324 is set up by de ressing the digit keys 13, 12 and 14 where y the selector 1s set in a corresponding manner, as above described. The key 24 is now depressed and is held in de pressed position until the calculating operation has been performed. In depressing the key 24 the catch lever 71 is released so that the flange ring 65 is released from the lever 73. The flange ring remains accordingly in its raised position and also the set counting spindles remains in operative position. The depression of the key 24 causes also a lowering of the slotted link 107 so that the tooth 110 of the pawl 108 is lowered to a. position below the rack 101, the latter as Well as the selector remaining accordingly unoperated in the set position. Each time the handle 2 handle is erred in the same manner as,

is operated the number 324 is according transferred to the main count' and at the same time the 11:1 :56 counting register is fed step by step; If the multlphcation is begun with the digit 4 the operated our times whereupon the key 201s epressed sothat the ca is moved one step to the ri ht as above described. The handle 2 is-tfien operated'furtlier three times. The main countin 'ster shows now the product 11016, theset up register the multiplicand 324 and the handle stroke counting register themulti plier 34. When the key 24 then is released the flange rin 65 is again coupled to the lever 73 by t e '08.t0h lever 71, inasmuch as the latter is held in an upper position by the spring 181. At the same time the slotted link 107 is raised by a spring 182 connected to the link 113 so that the pawl 108 comes in operative position to the rack 101. If

the handle 2 now Is again operated the selector and the operative counting spindles are reset in their normal positions.

1v1s io'n is performed in the same manner as multiplicatlon wlth the exception that the key 23 is first depressed so that-the clutch 49. is adjusted for reversing the direction of rotation of the shaft 48 as above described.

What I claim is 1. A calculating-machine, comprising ten digit keys, a rotatable selector having groups of adjustable stops, means for actuating said stops by pressing the digit keys, a rotatable counting drum 'ournalled coaxially with the selector and teeth corresponding to the digit numerals, counting spindles adapted to be set into 0 erative positions under the control of t e stops of the selector and said counting drum, register adapted to be operated by the rotation of said spindles.

2. .A calculating machine, comprisin ten digit keys, a stepwisely rotatable se ector having groups of adjustable stops, means for actuating said sto s by pressing the digit keys, a counting rum journalled coaxiall with the selector and rotatable in either direction, said drum having series of teeth corresponding to the digit numerals, counting spindles adapted to be set into operative positions under the control of the selector and to be rotated in either direction by the counting drum, and a main counting register adapted to be operated by the rotation of said spindles.

3. A calculating machine, comprising ten digit keys, a rotatable selector having groups of adjustable stops, a driving spring for said selector, ratchets for controlling a stepwise movement of the selector, means for operating said ratchets from the digit keys, a rotatable counting drum journalled coaxially with the selector and having series of aving series of lol Ill

- ter adapted to ,at-ing said steps turned into normal position,

teeth corresponding to the digit numerals, counting spindles adapted to be set in operative position under the control of the stops of the selector and to be rotated by said counting drum, and a main counting regisbe actuated by the ro ation of said spindles.

4. A calculating machine, comprising ten digit keys, a rotatable selector having groups of adjustable stops, means for actuating said stops by pressing the digit keys, a rotatable counting drum journalled coaxially with the selector and having series of teeth corresponding to the digit numerals, counting spindles adapted to be rotated by the counting drum. springs for adjusting said spindles in axial direction under the control of the stops of the selector, and means on the selector for locking the spindles in their normal positions.

5. A calculating machine, comprising ten digit keys, a rotatable selector having groups of adjustable stops. means for actuating said stops by pressing the digit keys, a rotatable counting drum journallcd coaxially with the selector and having series of teeth corresponding to the digit numerals, counting spindles adapted to be adjusted in axial direction and to be rotated by the counting drum, a main counting register adapted to be operated by the rotation of said spindles, and means for locking the spindles in their normal positions until the counting drum is rotated.

6. A calculating machine, comprising ten digit keys, a rotatable selector having groups of adjustable stops, means for actuby pressing the digit keys, a rotatable counting drum journalled coaxially with the selector and having series of teeth corresponding to the digit numerals,

. counting spindles adapted to be adjusted in axial direction and to be rotated by the counting drum, a main counting register adapted to be actuated by the rotation of said spindles, means for locking the spindles in their normal positions until the counting drum is rotated, and means for rcturning the spindles to normal position after the rotation of the counting drum.

7. A calculating machine, comprising ten digit keys, a selector having groups of adjustable stops, means for moving the selector stepwise, means for actuating the stops of the selector for adjusting them into operative positions, means for returning the stops into normal position when the selector is rea rotatable counting drum journalled coaxially with the selector and having series of teeth corresponding to the digit numerals, counting spindles adapted to be set into operative positions under the control 'of the stops of the selector and to be rotated by said counting drum, and a main counting register eeaaiae adapted to be operated by the rotation of said spindles.

8. A calculating machine, comprising ten digit keys, a rotatable selector having groups of adjustable stops, a rotatable counting drum journalled coaxiall-y with the selector and having series of teeth corresponding to the digit numeralsfqcounting spindles adapted to be axiallyadjusted into operative positions under the control of the stops of the selector and to be rotated by said counting drum, and a counting register adapted to be operated by the axial movements of the spindles.

9. A calculating machine, comprising .ten digit keys, a rotatable selector haying groups of adjustable stops, a rotatable counting drum journalled coaxially with the selector and having series of teeth corresponding to the digit numerals, rotatable and axially (lisplaceable counting spindles, a carriage, a. main counting register supported by said carriage, and means for transmitting motion from said spindles to said main counting register independently of the position of the carriage.

10. A calculating machine, comprising ten digit keys, a rotatable selector having groups of adjustable stops, a rotatable counting drum journalled coaxially with the selector and having series of teeth corresponding to the digit numerals, rotatable and axially displaceable counting spindles, a carriage, a

main counting register supported by said carriage, means for transmitting motion from said spindles to the main counting register, and a second counting register operated by the rotation of the counting drum independently of the counting spindles. 11. A calculating machine, comprising ten digit keys, a stepWisely rotatable selector, a rotatable counting drum journalled coaxial ly with the selector and having series of teeth corresponding to the digit numerals, axially displaceable counting spindles ada ted to be set into operative positions under the control of the selector and to be rotated by the counting drum, a main counting register adapted to be actuated by the rotation of said spindles, means for resetting the selector and the spindles to their normal positions after each rotation of the counting drum, and means for bring-in said resetting means in inoperative con itiOn during any desired time. v 12. A calculating machine, comprising ten digit keys, a stepwisely rotatable seelctor, a rotatable counting drum journalled coaxially with the selector and having series of teeth corresponding to the digit numerals, axially displaceable counting spindles ada ted to be set into operative positions under the control of the selector and to be rotated by the counting drum, a main counting register adapted to be actuated by the III 

